I love seeing all of those Mine Train pictures. It's hard to believe that the empty areas behind Tom Sawyer Island were once teeming with activity. I think we payed a heavy price when Big Thunder was put in, however much I like the ride. Ever since then it seems Frontierland has been marginalized or put on the back burner in Imagineering.
I really hope a new mine train comes to fruition. A ride like this in DCA would give a lot of movement and character to the Grizzly Peak side of the park. The only question is where a rainbow caverns area would go.
Anybody care to venture that if these plans work out Condor Flats would become Grizzly Flats, in honor of Ward Kimball's railroad?